/** @file
  Usb Credential Provider driver header file.
    
Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials 
are licensed and made available under the terms and conditions of the BSD License 
which accompanies this distribution.  The full text of the license may be found at 
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef _USB_CREDENTIAL_PROVIDER_H_
#define _USB_CREDENTIAL_PROVIDER_H_

#include <Uefi.h>

#include <Guid/GlobalVariable.h>
#include <Guid/FileInfo.h>
#include <Guid/SecurityPkgTokenSpace.h>
#include <Guid/UsbCredentialProviderHii.h>

#include <Protocol/SimpleFileSystem.h>
#include <Protocol/BlockIo.h>
#include <Protocol/UserCredential2.h>
#include <Protocol/UserManager.h>

#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DevicePathLib.h>
#include <Library/BaseCryptLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Library/PrintLib.h>
#include <Library/HiiLib.h>
#include <Library/PcdLib.h>

extern UINT8      UsbCredentialProviderStrings[];

#define USB_TABLE_INC          16
#define HASHED_CREDENTIAL_LEN  20

//
// Save the enroll user credential Information.
//
typedef struct {
  EFI_USER_INFO_IDENTIFIER  UserId;
  UINT8                     Token[HASHED_CREDENTIAL_LEN];
} USB_INFO;

//
// USB Credential Table.
//
typedef struct {
  UINTN     Count;
  UINTN     MaxCount;
  USB_INFO  UserInfo[1];
} CREDENTIAL_TABLE;

//
// The user information on the USB provider.
//
typedef struct {
  UINTN                         Count;
  EFI_USER_INFO                 *Info[1];
} USB_CREDENTIAL_INFO;

#define USB_PROVIDER_SIGNATURE  SIGNATURE_32 ('U', 'S', 'B', 'P')

typedef struct {
  UINTN                           Signature;
  EFI_HANDLE                      DriverHandle;
  EFI_HII_HANDLE                  HiiHandle;
} USB_PROVIDER_CALLBACK_INFO;

/**
  Enroll a user on a credential provider.

  This function enrolls and deletes a user profile using this credential provider. 
  If a user profile is successfully enrolled, it calls the User Manager Protocol 
  function Notify() to notify the user manager driver that credential information 
  has changed. If an enrolled user does exist, delete the user on the credential 
  provider.

  @param[in] This                Points to this instance of EFI_USER_CREDENTIAL2_PROTOCOL.
  @param[in] User                The user profile to enroll.
 
  @retval EFI_SUCCESS            User profile was successfully enrolled.
  @retval EFI_ACCESS_DENIED      Current user profile does not permit enrollment on the
                                 user profile handle. Either the user profile cannot enroll
                                 on any user profile or cannot enroll on a user profile 
                                 other than the current user profile.
  @retval EFI_UNSUPPORTED        This credential provider does not support enrollment in
                                 the pre-OS.
  @retval EFI_DEVICE_ERROR       The new credential could not be created because of a device
                                 error.
  @retval EFI_INVALID_PARAMETER  User does not refer to a valid user profile handle.
  
**/
EFI_STATUS
EFIAPI
CredentialEnroll (
  IN CONST  EFI_USER_CREDENTIAL2_PROTOCOL       *This,
  IN        EFI_USER_PROFILE_HANDLE             User
  );

/**
  Returns the user interface information used during user identification.

  This function enrolls a user on this credential provider. If the user exists on 
  this credential provider, update the user information on this credential provider; 
  otherwise delete the user information on credential provider.

  @param[in]  This       Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
  @param[out] Hii        On return, holds the HII database handle.
  @param[out] FormSetId  On return, holds the identifier of the form set which contains
                         the form used during user identification.
  @param[out] FormId     On return, holds the identifier of the form used during user 
                         identification.
                         
  @retval EFI_SUCCESS            Form returned successfully.
  @retval EFI_NOT_FOUND          Form not returned.
  @retval EFI_INVALID_PARAMETER  Hii is NULL or FormSetId is NULL or FormId is NULL.
  
**/
EFI_STATUS
EFIAPI
CredentialForm (
  IN CONST  EFI_USER_CREDENTIAL2_PROTOCOL       *This,
  OUT       EFI_HII_HANDLE                      *Hii,
  OUT       EFI_GUID                            *FormSetId,
  OUT       EFI_FORM_ID                         *FormId
  );

/**
  Returns bitmap used to describe the credential provider type.

  This optional function returns a bitmap which is less than or equal to the number
  of pixels specified by Width and Height. If no such bitmap exists, then EFI_NOT_FOUND
  is returned. 

  @param[in]     This    Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
  @param[in, out] Width  On entry, points to the desired bitmap width. If NULL then no 
                         bitmap information will be returned. On exit, points to the 
                         width of the bitmap returned.
  @param[in, out] Height On entry, points to the desired bitmap height. If NULL then no
                         bitmap information will be returned. On exit, points to the 
                         height of the bitmap returned.
  @param[out]    Hii     On return, holds the HII database handle. 
  @param[out]    Image   On return, holds the HII image identifier. 
 
  @retval EFI_SUCCESS            Image identifier returned successfully.
  @retval EFI_NOT_FOUND          Image identifier not returned.
  @retval EFI_INVALID_PARAMETER  Hii is NULL or Image is NULL.
  
**/
EFI_STATUS
EFIAPI
CredentialTile (
  IN CONST  EFI_USER_CREDENTIAL2_PROTOCOL       *This,
  IN OUT    UINTN                               *Width,
  IN OUT    UINTN                               *Height,
  OUT       EFI_HII_HANDLE                      *Hii,
  OUT       EFI_IMAGE_ID                        *Image
  );

/**
  Returns string used to describe the credential provider type.

  This function returns a string which describes the credential provider. If no
  such string exists, then EFI_NOT_FOUND is returned. 

  @param[in]  This       Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
  @param[out] Hii        On return, holds the HII database handle.
  @param[out] String     On return, holds the HII string identifier.
 
  @retval EFI_SUCCESS            String identifier returned successfully.
  @retval EFI_NOT_FOUND          String identifier not returned.
  @retval EFI_INVALID_PARAMETER  Hii is NULL or String is NULL.
  
**/
EFI_STATUS
EFIAPI
CredentialTitle (
  IN CONST  EFI_USER_CREDENTIAL2_PROTOCOL       *This,
  OUT       EFI_HII_HANDLE                      *Hii,
  OUT       EFI_STRING_ID                       *String
  );

/**
  Return the user identifier associated with the currently authenticated user.

  This function returns the user identifier of the user authenticated by this credential
  provider. This function is called after the credential-related information has been 
  submitted on a form OR after a call to Default() has returned that this credential is
  ready to log on.

  @param[in]  This           Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
  @param[in]  User           The user profile handle of the user profile currently being 
                             considered by the user identity manager. If NULL, then no user
                             profile is currently under consideration.
  @param[out] Identifier     On return, points to the user identifier. 
 
  @retval EFI_SUCCESS        User identifier returned successfully.
  @retval EFI_NOT_READY      No user identifier can be returned.
  @retval EFI_ACCESS_DENIED  The user has been locked out of this user credential.
  @retval EFI_INVALID_PARAMETER  This is NULL, or Identifier is NULL.
  @retval EFI_NOT_FOUND          User is not NULL, and the specified user handle can't be
                                 found in user profile database.
  
**/
EFI_STATUS
EFIAPI
CredentialUser (
  IN CONST  EFI_USER_CREDENTIAL2_PROTOCOL       *This,
  IN        EFI_USER_PROFILE_HANDLE             User,
  OUT       EFI_USER_INFO_IDENTIFIER            *Identifier
  );

/**
  Indicate that user interface interaction has begun for the specified credential.

  This function is called when a credential provider is selected by the user. If 
  AutoLogon returns FALSE, then the user interface will be constructed by the User
  Identity Manager. 

  @param[in]  This       Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
  @param[out] AutoLogon  On return, points to the credential provider's capabilities 
                         after the credential provider has been selected by the user. 
 
  @retval EFI_SUCCESS            Credential provider successfully selected.
  @retval EFI_INVALID_PARAMETER  AutoLogon is NULL.
  
**/
EFI_STATUS
EFIAPI
CredentialSelect (
  IN  CONST  EFI_USER_CREDENTIAL2_PROTOCOL   *This,
  OUT        EFI_CREDENTIAL_LOGON_FLAGS      *AutoLogon
  );

/**
  Indicate that user interface interaction has ended for the specified credential.

  This function is called when a credential provider is deselected by the user.

  @param[in] This        Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
 
  @retval EFI_SUCCESS    Credential provider successfully deselected.
  
**/
EFI_STATUS
EFIAPI
CredentialDeselect (
  IN CONST  EFI_USER_CREDENTIAL2_PROTOCOL       *This
  );

/**
  Return the default logon behavior for this user credential.

  This function reports the default login behavior regarding this credential provider.  

  @param[in]  This       Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
  @param[out] AutoLogon  On return, holds whether the credential provider should be used
                         by default to automatically log on the user.  
 
  @retval EFI_SUCCESS            Default information successfully returned.
  @retval EFI_INVALID_PARAMETER  AutoLogon is NULL.

**/
EFI_STATUS
EFIAPI
CredentialDefault (
  IN CONST  EFI_USER_CREDENTIAL2_PROTOCOL       *This,
  OUT       EFI_CREDENTIAL_LOGON_FLAGS          *AutoLogon
  );

/**
  Return information attached to the credential provider.

  This function returns user information. 

  @param[in]      This          Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
  @param[in]      UserInfo      Handle of the user information data record. 
  @param[out]     Info          On entry, points to a buffer of at least *InfoSize bytes. On
                                exit, holds the user information. If the buffer is too small
                                to hold the information, then EFI_BUFFER_TOO_SMALL is returned
                                and InfoSize is updated to contain the number of bytes actually
                                required.
  @param[in, out] InfoSize      On entry, points to the size of Info. On return, points to the 
                                size of the user information. 
 
  @retval EFI_SUCCESS           Information returned successfully.
  @retval EFI_BUFFER_TOO_SMALL  The size specified by InfoSize is too small to hold all of the
                                user information. The size required is returned in *InfoSize.
  @retval EFI_INVALID_PARAMETER Info is NULL or InfoSize is NULL.
  @retval EFI_NOT_FOUND         The specified UserInfo does not refer to a valid user info handle. 
                                
**/
EFI_STATUS
EFIAPI
CredentialGetInfo (
  IN CONST  EFI_USER_CREDENTIAL2_PROTOCOL       *This,
  IN        EFI_USER_INFO_HANDLE                UserInfo,
  OUT       EFI_USER_INFO                       *Info,
  IN OUT    UINTN                               *InfoSize
  );

/**
  Enumerate all of the user informations on the credential provider.

  This function returns the next user information record. To retrieve the first user
  information record handle, point UserInfo at a NULL. Each subsequent call will retrieve
  another user information record handle until there are no more, at which point UserInfo
  will point to NULL. 

  @param[in]      This     Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
  @param[in, out] UserInfo On entry, points to the previous user information handle or NULL
                           to start enumeration. On exit, points to the next user information
                           handle or NULL if there is no more user information.
 
  @retval EFI_SUCCESS            User information returned.
  @retval EFI_NOT_FOUND          No more user information found.
  @retval EFI_INVALID_PARAMETER  UserInfo is NULL.
  
**/
EFI_STATUS
EFIAPI
CredentialGetNextInfo (
  IN CONST  EFI_USER_CREDENTIAL2_PROTOCOL       *This,
  IN OUT    EFI_USER_INFO_HANDLE                *UserInfo
  );

/**
  Delete a user on this credential provider.

  This function deletes a user on this credential provider. 

  @param[in]     This            Points to this instance of the EFI_USER_CREDENTIAL2_PROTOCOL.
  @param[in]     User            The user profile handle to delete.

  @retval EFI_SUCCESS            User profile was successfully deleted.
  @retval EFI_ACCESS_DENIED      Current user profile does not permit deletion on the user profile handle. 
                                 Either the user profile cannot delete on any user profile or cannot delete 
                                 on a user profile other than the current user profile. 
  @retval EFI_UNSUPPORTED        This credential provider does not support deletion in the pre-OS.
  @retval EFI_DEVICE_ERROR       The new credential could not be deleted because of a device error.
  @retval EFI_INVALID_PARAMETER  User does not refer to a valid user profile handle.
**/
EFI_STATUS
EFIAPI
CredentialDelete (
  IN CONST  EFI_USER_CREDENTIAL2_PROTOCOL       *This,
  IN        EFI_USER_PROFILE_HANDLE             User
  );

#endif
